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Finding the Fourth Proportional to 18,991.27, 26,209.19 and 10,493.40

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Solution

The fourth proportional to 18,991.27, 26,209.19 and 10,493.40 is: 14,481.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.27 : 26,209.19 = 10,493.40 : x
  2. Step 2: Convert to fraction form
    18,991.27/26,209.19 = 10,493.40/x
  3. Step 3: Cross multiply
    18,991.27x = 26,209.19 × 10,493.40
  4. Step 4: Simplify right side
    18,991.27x = 275,023,383.30
  5. Step 5: Solve for x
    x = 275,023,383.30/18,991.27
  6. Step 6: Final answer
    x = 14,481.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.